If you struggle with attachment to your T, I’d definitely recommend DBT. However, most DBT therapists who offer phone coaching also have pretty strict boundaries and are adherent DBT - meaning they will expect you to fill out diary cards, BCAs (behavior chain analysis), and perhaps even join a skills group. The exercises are very similar to CBT, as DBT and CBT overlap in many ways (yet different in some) My therapist is a bit lenient, which does make me nervous her more lax boundaries may cause me to become attached. Since many DBT therapists do offer out of session contact, I think that’s why adherent DBT is so structured so as to help the client gain skills without becoming overly dependent on the therapist for the out of session support.